# {py:mod}`qcheff.models.duffing.duffing_chain_utils`

```{py:module} qcheff.models.duffing.duffing_chain_utils
```

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils
:allowtitles:
```

## Module Contents

### Classes

````{list-table}
:class: autosummary longtable
:align: left

* - {py:obj}`DuffingChain <qcheff.models.duffing.duffing_chain_utils.DuffingChain>`
  - ```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.DuffingChain
    :summary:
    ```
````

### Functions

````{list-table}
:class: autosummary longtable
:align: left

* - {py:obj}`create_duffing_chain_system <qcheff.models.duffing.duffing_chain_utils.create_duffing_chain_system>`
  - ```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.create_duffing_chain_system
    :summary:
    ```
* - {py:obj}`create_linear_spectrum_zz_chain <qcheff.models.duffing.duffing_chain_utils.create_linear_spectrum_zz_chain>`
  - ```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.create_linear_spectrum_zz_chain
    :summary:
    ```
* - {py:obj}`duffing_chain_num_ham <qcheff.models.duffing.duffing_chain_utils.duffing_chain_num_ham>`
  - ```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.duffing_chain_num_ham
    :summary:
    ```
* - {py:obj}`duffing_chain_qutip_ham <qcheff.models.duffing.duffing_chain_utils.duffing_chain_qutip_ham>`
  - ```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.duffing_chain_qutip_ham
    :summary:
    ```
* - {py:obj}`duffing_chain_scq_hilbertspace <qcheff.models.duffing.duffing_chain_utils.duffing_chain_scq_hilbertspace>`
  - ```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.duffing_chain_scq_hilbertspace
    :summary:
    ```
````

### API

`````{py:class} DuffingChain
:canonical: qcheff.models.duffing.duffing_chain_utils.DuffingChain

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.DuffingChain
```

````{py:attribute} qubits
:canonical: qcheff.models.duffing.duffing_chain_utils.DuffingChain.qubits
:type: list[qcheff.duffing.duffing_utils.DuffingOscQubit]
:value: >
   None

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.DuffingChain.qubits
```

````

````{py:attribute} couplings
:canonical: qcheff.models.duffing.duffing_chain_utils.DuffingChain.couplings
:type: list[float]
:value: >
   None

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.DuffingChain.couplings
```

````

````{py:attribute} ntrunc
:canonical: qcheff.models.duffing.duffing_chain_utils.DuffingChain.ntrunc
:type: int
:value: >
   None

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.DuffingChain.ntrunc
```

````

`````

````{py:function} create_duffing_chain_system(omegas, alphas, couplings, ntrunc: int = 3)
:canonical: qcheff.models.duffing.duffing_chain_utils.create_duffing_chain_system

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.create_duffing_chain_system
```
````

````{py:function} create_linear_spectrum_zz_chain(delta1: float, delta2: float, alpha1: float = -0.3, alpha2: float = -0.3, num_resonators: int = 1, omega_res: float = 5, delta_omega_res: float = 0.6, g: float = 0.1, ntrunc: int = 3, debug: bool = False) -> qcheff.models.duffing.duffing_chain_utils.DuffingChain
:canonical: qcheff.models.duffing.duffing_chain_utils.create_linear_spectrum_zz_chain

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.create_linear_spectrum_zz_chain
```
````

````{py:function} duffing_chain_num_ham(example: qcheff.models.duffing.duffing_chain_utils.DuffingChain)
:canonical: qcheff.models.duffing.duffing_chain_utils.duffing_chain_num_ham

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.duffing_chain_num_ham
```
````

````{py:function} duffing_chain_qutip_ham(example: qcheff.models.duffing.duffing_chain_utils.DuffingChain)
:canonical: qcheff.models.duffing.duffing_chain_utils.duffing_chain_qutip_ham

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.duffing_chain_qutip_ham
```
````

````{py:function} duffing_chain_scq_hilbertspace(example: qcheff.models.duffing.duffing_chain_utils.DuffingChain)
:canonical: qcheff.models.duffing.duffing_chain_utils.duffing_chain_scq_hilbertspace

```{autodoc2-docstring} qcheff.models.duffing.duffing_chain_utils.duffing_chain_scq_hilbertspace
```
````